I will talk about Yang-Mills theory on four dimensional Anti-de Sitter space. The Dirichlet boundary condition cannot exist at arbitrarily large radius because it would give rise to colored asymptotic states in flat space. This implies a deconfinement-confinement transition as the radius is increased. I will show hints on the nature of this transition obtained in 2407.06268 using perturbation theory. The results favor the scenario of merger and annihilation as the most promising candidate for the transition.